Discussion
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- Question
Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 kΩ of resistance?
Options- A. 27.2 mA
- B. 59 mA
- C. 5.9 mA
- D. 590 mA
- Correct Answer
- 5.9 mA
- 1. How much voltage is needed to produce 2.5 A of current through a 200 Ω resistor?
Options- A. 50 V
- B. 500 V
- C. 80 V
- D. 8 V Discuss
- 2. Approximately how much current flows through a 3.3 MΩ resistor across a 30 V source?
Options- A. 9 µA
- B. 90 µA
- C. 900 µA
- D. 9000 µA Discuss
- 3. When 12 V are applied across a 68 Ω resistor, the current is
Options- A. 816 mA
- B. 17.6 mA
- C. 176 mA
- D. 8.16 mA Discuss
- 4. The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The resistance of the bulb is approximately
Options- A. 112 Ω
- B. 11.2 Ω
- C. 1.2 Ω
- D. 18 Ω Discuss
- 5. Four amperes of current are measured through a 24 Ω resistor connected across a voltage source. How much voltage does the source produce?
Options- A. 960 V
- B. 9.6 V
- C. 96 V
- D. 8 V Discuss
- 6. How much resistance is required to limit the current from a 12 V battery to 3.6 mA?
Options- A. 3.3 kΩ
- B. 33 kΩ
- C. 2.2 kΩ
- D. 22 kΩ Discuss
- 7. How much resistance is needed to draw 17.6 mA from a 12 volt source?
Options- A. 212 Ω
- B. 6.8 kΩ
- C. 68 Ω
- D. 680 Ω Discuss
- 8. Twelve volts are applied across a resistor. A current of 3 mA is measured. What is the value of the resistor?
Options- A. 4 Ω
- B. 400 Ω
- C. 4 kΩ
- D. 4.4 Ω Discuss
- 9. You are measuring the current in a circuit that is operated on an 18 V battery. The ammeter reads 40 mA. Later you notice the current has dropped to 20 mA. How much has the voltage changed?
Options- A. 9 V
- B. 900 mV
- C. 0 V
- D. 18 V Discuss
- 10. What is the approximate filament resistance of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing?
Options- A. 183 Ω
- B. 18.3 Ω
- C. 66 Ω
- D. 6.6 Ω Discuss
Ohm's Law problems
Search Results
Correct Answer: 500 V
Correct Answer: 9 µA
Correct Answer: 176 mA
Correct Answer: 112 Ω
Correct Answer: 96 V
Correct Answer: 3.3 kΩ
Correct Answer: 680 Ω
Correct Answer: 4 kΩ
Correct Answer: 9 V
Correct Answer: 183 Ω
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